Siemens SIMATIC S7-1200 - Page 626

Technology instructions
10.2 PID control
S7-1200 Programmable controller
626 System Manual, V4.2, 09/2016, A5E02486680-AK
Controller type
Setting
TO-DB parameter
Data
type
Value range
Description
Physical
quantity
"PhysicalQuantity" Int
(Enu
m)
• General
• Temperature
(=default)
Pre-selection for physical
unit value
No multi-value control
and not editable in online
mode of functional view.
Unit of
meas-
urement
"PhysicalUnit Int
(Enu
m)
• General: Units =
%
• Temperature:
Units (possible
selections) =
– °C (=default)
– °F
– K
User unit selection is set
back to “0” if you change
the physical quantity.
Activate
mode
after
CPU
restart
"RunModeByStartup" Bool Checkbox If set to TRUE (=default),
the controller switches to
the state that is stored in
the “Mode” variable after
a powercycle (Power on -
off - on) or PLC STOP-to-
RUN transition. Other-
wise, the PID_Temp
remains in “Inactive”
mode.
Set
mode to
"Mode" Int
(Enu
m)
Modes (possible
selections):
• 0: Inactive
• 1: Pretuning
• 2: Fine tuning
• 3: Automatic
mode
• 4: Manual mode
(=default)
The engineering station
(ES) sets the start value
of the“Mode” variable
according to user selec-
tion.The default value of
Mode (stored inTO-DB) is
Manual Mode.